Analysis of the Characteristics of a Biharmonic Oscillator with Two Synchronous ModesDaniil A. Frolov, Ansar R. Safin, Nikolay N. Udalov, Ludmila A. Tsyrulnikova, Dmitry A. Volkov and Valery A. SotskovE3S Web Conf., 351 (2022) 01057DOI: https://doi.org/10.1051/e3sconf/202235101057